South Dakota 811

Welcome to!

Use South Dakota 811 to locate underground utilities before you dig. Excavators planning to dig, drill or trench should make the required locate request to South Dakota 811 two working days before the planned work. Homeowners and landowners planning their own excavation activities are required to notify South Dakota 811 as well.

SD color code

Submit a locate request 24/7 to South Dakota 811 by:

Phone: Make a free call to 811 (in-state) or (800) 781-7474 (outside of South Dakota).

Web Portal: Use the new South Dakota 811 Web portal for faster processing of locate requests. Web Portal users must complete a short training session. Contact Training to request a demo or ask questions about the Web Portal. (Please note that the portal url has been updated)

Mobile App: Use the new South Dakota 811 mobile app for convenient and quick connection from wherever you are. Follow these instructions to download the app on your mobile device. This App is now available for use on Android products.

Newsletter: Sign up for the Excavator Newsletter HERE.
Sign up for the Utility Member Newsletter HERE.

Some underground lines on private property are privately-owned and may not be marked by a utility. Other underground lines, between a meter and the home or business, may be considered privately-owned. In these cases a charge by the utility may apply to locate and mark those lines.

South Dakota 811 provides for communication between excavators and underground facility operators so buried utilities can be marked in advance of any digging. Following the South Dakota 811 procedure works to reduce damages to underground infrastructure, helps to ensure public and worker safety, and protects the integrity of utility services.
Supporters and respected sites: